body, html { font-size: 100%; 	padding: 0; margin: 0;}

/* Reset */
*,
*:after,
*:before {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

/* Clearfix hack by Nicolas Gallagher: http://nicolasgallagher.com/micro-clearfix-hack/ */
.clearfix:before,
.clearfix:after {
	content: " ";
	display: table;
}

.clearfix:after {
	clear: both;
}

body{
	color: rgba(0, 0, 0, 0.51);
	font-weight: 500;
	font-size: 1.05em;
	font-family: "Microsoft YaHei","Segoe UI", "Lucida Grande", Helvetica, Arial,sans-serif;
}
.container{
	margin:60px auto;
}

/*nav*/
.demo a{color: #fff;text-decoration: none;}
.demo{width: 100%;height: 500px;padding-bottom: 1.2em;}
.demo a,button{display: inline-block;margin: 0.5em;padding: 0.6em 1em;border: 3px solid #fff;font-weight: 700;}
.demo a:hover,button{opacity: 0.6;}
.demo a.current{background:#1d7db1;color: #fff; }

.center{text-align: center;}